Locking cannula



FIG. 1 is a perspective view of a locking cannula showing my new design;

FIG. 2 is a top plan view thereof, which is a mirror image of the bottomplan view thereof;

FIG. 3 is a right side view, which is a mirror image of the left sideview thereof;

FIG. 4 is a front end view thereof; and,

FIG. 5 is a rear end view thereof.

CLAIM The ornamental design for the locking cannula, as shown anddescribed.